Results 71 to 80 of about 563,907 (301)

Microwave Slow-Wave Structure and Phase-Compensation Technique for Microwave Power Divider [PDF]

, 2014
In this paper, T-shaped electromagnetic bandgap is loaded on a coupled transmission line itself and its electric performance is studied. Results show that microwave slow-wave effect can be enhanced and therefore, size reduction of a transmission-line ...
Gao, S. S., Li, J. L., Shao, W., Wang, J. P., Yang, X. S.   +4 more
core   +1 more source

Enhancing Low‐Temperature Performance of Sodium‐Ion Batteries via Anion‐Solvent Interactions

Advanced Functional Materials, EarlyView.
DOL is introduced into electrolytes as a co‐solvent, increasing slat solubility, ion conductivity, and the de‐solvent process, and forming an anion‐rich solvent shell due to its high interaction with anion. With the above virtues, the batteries using this electrolyte exhibit excellent cycling stability at low temperatures. Abstract Sodium‐ion batteries
Cheng Zheng, Qian Yao, Yanan Sun, Hongyu Lv, Zhongchao Bai, Guoliang Zhang, Nana Wang, Jian Yang   +7 more
wiley   +1 more source

Development of 3 kV low‐frequency induction voltage divider using two‐stage excitation

High Voltage
To address the lack of voltage ratio standards for accuracy testing of low‐frequency voltage transformers, it is necessary to develop a 3 kV low‐frequency induction voltage divider.
Xuan Li, Jiang Guo, Jiangang Bi, Hui Li
doaj   +1 more source

MnI‐Functionalized Covalent Organic Framework as Efficient Electrocatalyst for CO2 Reduction in a Catholyte‐Free Zero‐Gap Electrolyzer

Advanced Functional Materials, EarlyView.
This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies, Marcos Eduardo G. Carmo, Gonçalves J. Marrenjo, Stephan Reuther, Patrick Ganswindt, Antonio Otavio T. Patrocinio, Thomas Bein, Osmando F. Lopes, Jenny Schneider   +8 more
wiley   +1 more source

A Fast Calculation Method of 3D Temperature Field of Oil‐Immersed Transformer Based on Point Cloud U‐Net++ Neural Network

IET Electric Power Applications
To address the challenges in real‐time 3D temperature field analysis for intelligent power systems, we propose a fast calculation method based on point cloud U‐net++ neural network.
Rongyun Fu, Yunpeng Liu, Kexin Liu, Gang Liu, Liwei Jiang, Haoyu Liu, Shuguo Gao   +6 more
doaj   +1 more source

All‐in‐One Analog AI Hardware: On‐Chip Training and Inference with Conductive‐Metal‐Oxide/HfOx ReRAM Devices

Advanced Functional Materials, EarlyView.
An all‐in‐one analog AI accelerator is presented, enabling on‐chip training, weight retention, and long‐term inference acceleration. It leverages a BEOL‐integrated CMO/HfOx ReRAM array with low‐voltage operation (<1.5 V), multi‐bit capability over 32 states, low programming noise (10 nS), and near‐ideal weight transfer.
Donato Francesco Falcone, Victoria Clerico, Wooseok Choi, Tommaso Stecconi, Folkert Horst, Laura Bégon‐Lours, Matteo Galetta, Antonio La Porta, Nikhil Garg, Fabien Alibart, Bert Jan Offrein, Valeria Bragaglia   +11 more
wiley   +1 more source

Demonstration of an All‐Optical AND Gate Mediated by Photochromic Molecules

Advanced Functional Materials, EarlyView.
A logic AND gate that runs on photons is demonstrated. It relies on two spatially separated photochromic molecules that work in tandem. Abstract The realization of a photonic logic AND gate, i.e. a logic AND gate that runs on photons rather than electrons, and where all steps are controlled by light, is demonstrated. In a proof‐of‐principle experiment,
Heyou Zhang, Max Gießübel, Pankaj Dharpure, Andrea Albert, Vira Niestierkina, Paul Mulvaney, Mukundan Thelakkat, Jürgen Köhler   +7 more
wiley   +1 more source

Analysis of vibration evolution and propagation characteristics due to mechanical degradation in transformer iron cores

High Voltage
This study investigates vibration changes due to transformer core deterioration by monitoring core vibration, compression force and shell wall vibrations simultaneously.
Yunpeng Liu, Guanyu Chen, Fuseng Xu, Tao Zhao, Hongliang Liu, Lu Sun   +5 more
doaj   +1 more source

Experimental Study on Pressure-Deformation-Contact Resistance Characteristics of Converter Transformer Valve Side Casing Louver Contacts

IEEE Access
The performance degradation of oil-immersed louver contacts are the main reason for the DC resistance exceeding the standard on the valve side of UHV converter transformers.
Shihong Hu, Zhicheng Huang, Jiahui Chen, Chi Yuan, Bozhang Feng, Tao Zhao, Yunpeng Liu   +6 more
doaj   +1 more source

A Method for Diagnosing Mechanical Faults of on-Load Tap Changer Based on Ensemble Empirical Mode Decomposition, Volterra Model and Decision Acyclic Graph Support Vector Machine

IEEE Access, 2019
A method combined ensemble empirical mode decomposition, Volterra model and decision acyclic graph support vector machine was proposed to improve adaptability, feature resolution, and identification accuracy when diagnosing mechanical faults in an on ...
Yuqin Xu, Cong Zhou, Jianghai Geng, Shuguo Gao, Ping Wang   +4 more
doaj   +1 more source